In April of 1991, a group of cousins visit the Chain of Rocks Bridge in Missouri to view a poem one of them had spray painted on the bridge. The evening goes terribly wrong, ending in the death of two young girls, the arrest of an innocent and an investigation with lots of twist and turns.
Sources:
American-Justice: The Bridge Murders
A Rip in Heaven by Jeanine Cummins
Wikipedia.org
nytimes.com
nydailynews.com
murderpedia.org
missouririverwatertrail.org
stlamerican.org